night letter

Noun

 * 1)  A telegram sent overnight at a reduced rate for delivery on the morning of the following day, typically with a minimum charge for 25 words or less.
 * 2) An unsigned leaflet distributed clandestinely.
 * 1) An unsigned leaflet distributed clandestinely.
 * 1) An unsigned leaflet distributed clandestinely.
 * 1) An unsigned leaflet distributed clandestinely.